Hi,
This looks like it should work, until you see your "__init()" method should
be "__init__()"!
Patrick
On Friday, 1 May 2020 05:23:08 UTC+9:30, Wahabo Ouedraogo wrote:
>
> Hi everyone!
> I created a class Plot_Curve_Item that herite of the PlotCurveItem class
> of pyqtgraph. In the manufacturer of the class, I declare a timer which is
> a QTimeLine instance of Qt. I redefine the HoverEvent method to increase
> the thickness of the curve when the mouse flies over it for a time of
> 1000ms. so I call the start function of QTimerLine to start the timer. I
> connect the finished signal of the timer to the Timer slot that I defined
> in the class Plot_Curve_Item to draw the width of the curve to 2 once the
> time of 1000 ms is elapsed. However, when I execute the code, python sends
> me this message:
>
> Error sending hover exit event:
>
> *|==============================>>*
> * | Traceback (most recent call last):*
> * | File "d:/Documents/VISUAL STUDIO CODE EXO/PlotCurve.py", line
> 39, in <module>*
> * | sys.exit(app.exec_())*
> * | File
> "C:\Users\ThinkPad\AppData\Local\Programs\Python\Python38-32\lib\site-packages\pyqtgraph\widgets\GraphicsView.py",
>
> line 368, in mouseMoveEvent*
> * | QtGui.QGraphicsView.mouseMoveEvent(self, ev)*
> * | File
> "C:\Users\ThinkPad\AppData\Local\Programs\Python\Python38-32\lib\site-packages\pyqtgraph\GraphicsScene\GraphicsScene.py",
>
> line 162, in mouseMoveEvent*
> * | self.sendHoverEvents(ev)*
> * | File
> "C:\Users\ThinkPad\AppData\Local\Programs\Python\Python38-32\lib\site-packages\pyqtgraph\GraphicsScene\GraphicsScene.py",
>
> line 256, in sendHoverEvents*
> * | debug.printExc("Error sending hover exit event:")*
> * | --- exception caught here ---*
> * | File
> "C:\Users\ThinkPad\AppData\Local\Programs\Python\Python38-32\lib\site-packages\pyqtgraph\GraphicsScene\GraphicsScene.py",
>
> line 254, in sendHoverEvents*
> * | item.hoverEvent(event)*
> * | File "d:/Documents/VISUAL STUDIO CODE EXO/PlotCurve.py", line
> 20, in hoverEvent*
> * | self.timer.start()*
> * | AttributeError: 'Plot_Curve_Item' object has no attribute 'timer'*
> * |==============================<<*
>
> *Here's the whole code:*
>
>
>
> from PyQt5.QtCore import *
> from PyQt5.QtGui import *
> from PyQt5.QtWidgets import *
> import pyqtgraph as pg
> from pyqtgraph.Qt import QtGui, QtCore
> import numpy as np
> import time
> import sys
>
>
> class Plot_Curve_Item(pg.PlotCurveItem):
> def __init(self,parent = None):
> super().__init__(parent=parent)
> self.setParent(parent)
> self.timer = QTimeLine(1000)
> self.timer.finished.connect(self.Timer)
>
> def hoverEvent(self,event):
> self.timer.start()
> self.setPen(width=4)
>
> def Timer(self):
> self.setPen(width=2)
>
>
> if __name__ == "__main__":
> app = QApplication(sys.argv)
> widget = QMainWindow()
> x1 = np.linspace(0,20,10)
> y1 = np.arange(0,10)
> Plot_Widget = pg.PlotWidget()
> Plot_Item = pg.PlotItem()
> plot_item_curve = Plot_Curve_Item(x1,y1)
> Plot_Item.addItem(plot_item_curve)
> Plot_Widget.addItem(Plot_Item)
> widget.setCentralWidget(Plot_Widget)
> widget.show()
> sys.exit(app.exec_())
>
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